My advice is that, if you are having trouble with something related to the traits you've mentioned, then you might ask said psychiatrist to investigate the possibility of autism spectrum disorder. But you may not even need a diagnosis to get whatever help you need. Social skills classes are available for people on and off the autism spectrum--people with everything from ADHD to social anxiety disorder can benefit. It's possible to work on specific issues without ever answering the "Am I on the spectrum?" question definitively. If your psychiatrist knows that you have autistic traits, he can take that into account and may not need a definite yes/no the way he might if you were a new client without any current diagnosis.